代码如下，为什么每次运行度数都为0

#include<stdio.h>
#define DF 57.295779
int main(void)
{
    double radians;
    double degrees;
   
    printf("Enter the angle in radians:");
    scanf("%1f",&radians);
   
    degrees=radians*DF;
   
    printf("Degrees is %1f",degrees);
    return 0;
}

刚开始学c，书上印的和1一样，谢谢了